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9 results on '"R. F. Oppenheim"'

1. A measurement of the ratio of the nucleon structure function in copper and deuterium

Author

J. Womersley, T. O. Niinikoski, N. Pavel, C. Benchouk, T. Schröder, W.S.C. Williams, F. Lettenström, G.R. Court, V. Papavassiliou, Jozsef Toth, F. G. Oakham, F. Combley, Tim Jones, M. I. Ferrero, Ricardo Piegaia, R. F. Oppenheim, Klaus Mönig, E. Gabathuler, T. Lindqvist, V. W. Hughes, T. Ernst, B. Badelek, B. Pietrzyk, Stephen Wimpenny, Joshua Thompson, Ulrich Landgraf, Bogdan Povh, E. Rondio, J. Gillies, K. P. Schüler, B. Korzen, J. Gajewski, M. C. Caputo, K. Schultze, D. Lanske, A. Jacholkowska, A. Sandacz, L. Urban, E. M. Kabuss, G. D'Agostini, S.C. Brown, L. Ropelewski, P. B. Renton, J. S. Chima, N. Dyce, H. E. Stier, D. von Harrach, Klaus Hamacher, H. Peschel, F. Montanet, Jacek Ciborowski, P. Grafström, M. Matthews, T. A. Shibata, P.J. Hayman, J. Drees, J. M. Rieubland, W. Wallucks, S. Wheeler, David Francis, J. Stock, C. Peroni, T. Walcher, J. Nassalski, Günter Baum, K. Rith, J.R. Holt, V. Gibson, R. W. Clifft, Amedeo Staiano, U. Krüner, Geoffrey Taylor, A. W. Edwards, P. R. Norton, R. Gamet, Y. Mizuno, Christopher Bee, Karl Ziemons, J. G. Ashman, Harry Cheung, D. Salmon, A.M. Osborne, S. Kullander, T. J. Sloan, M. C. Edwards, Roland Windmolders, Michael Düren, I. G. Bird, G. Coignet, J. Beaufays, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Quark, Particle physics, forward spectrometer: experimental results, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], muon nucleus: deep inelastic scattering, Physics and Astronomy (miscellaneous), Nuclear Theory, deep inelastic scattering: muon deuteron, chemistry.chemical_element, Elementary particle, muon deuteron: deep inelastic scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, effect: shadowing, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Redistribution (chemistry), Quantum field theory, deep inelastic scattering: muon nucleus, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, structure function: ratio, nucleon: structure function, CERN SPS, quark: momentum spectrum, Copper, Deuterium, chemistry, copper, 100: 120: 200: 280 GeV, Nucleon, Electron scattering, Particle Physics - Experiment
Abstract

Results are presented on the ratios of the nucleon structure function in copper to deuterium from two separate experiments. The data confirm that the nucleon structure function,F2, is different for bound nucleons than for the quasi-free ones in the deuteron. The redistribution in the fraction of the nucleon's momentum carried by quarks is investigated and it is found that the data are compatible with no integral loss of quark momenta due to nuclear effects.

Published
1993

2. Muoproduction of $J/\psi$ and the gluon distribution of the nucleon

Author

B. Pietrzyk, P. B. Renton, Joshua Thompson, Klaus Mönig, T. Lindqvist, Roland Windmolders, T. Walcher, B. Korzen, T. Schröder, A. W. Edwards, Geoffrey Taylor, G. D'Agostini, Michael Düren, M. Edwards, P. R. Norton, S. Wheeler, J. M. Rieubland, J. Nassalski, I. G. Bird, G. Coignet, J. S. Chima, David Francis, W.S.C. Williams, J. G. Ashman, Jozsef Toth, K. Schultze, Harry Cheung, D. Salmon, F. Combley, F. Montanet, S.C. Brown, D. Lanske, M. C. Caputo, Tim Jones, A.M. Osborne, S. Kullander, Ricardo Piegaia, Amedeo Staiano, T. J. Sloan, Klaus Hamacher, R. Gamet, V. Papavassiliou, M. I. Ferrero, Y. Mizuno, J. Beaufays, F. Lettenström, J. Gillies, F. G. Oakham, L. Urban, K. P. Schüler, Jacek Ciborowski, Christopher Bee, T. O. Niinikoski, N. Pavel, C. Benchouk, J. Drees, L. Ropelewski, N. Dyce, J. Gajewski, Günter Baum, Karl Ziemons, P. Grafström, P.J. Hayman, H. E. Stier, G.R. Court, H. Peschel, A. Jacholkowska, E. Gabathuler, T. A. Shibata, T. Ernst, B. Badelek, J. Womersley, Stephen Wimpenny, A. Sandacz, R. F. Oppenheim, V. W. Hughes, Ulrich Landgraf, Bogdan Povh, R. W. Clifft, U. Krüner, D. von Harrach, W. Wallucks, C. Peroni, K. Rith, E. Rondio, E. M. Kabuss, M. Matthews, J. Stock, J.R. Holt, V. Gibson, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Particle physics, forward spectrometer: experimental results, rapidity dependence: differential cross section, Physics and Astronomy (miscellaneous), Meson, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], differential cross section: rapidity dependence, Nuclear Theory, Virtual particle, leptonic decay: J/psi(3100), 01 natural sciences, J/psi(3100): hadroproduction, Nuclear physics, tin, 0103 physical sciences, transverse momentum: differential cross section, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), deuterium, Physics, Muon, 010308 nuclear & particles physics, carbon, High Energy Physics::Phenomenology, gluon: momentum spectrum, parametrization, nucleon: structure function, HERA, CERN SPS, Quarkonium, Deep inelastic scattering, Gluon, muon nucleus: inclusive reaction, J/psi(3100): leptonic decay, differential cross section: transverse momentum, 280 GeV, muon p: inclusive reaction, color: singlet, High Energy Physics::Experiment, hadroproduction: J/psi(3100), Nucleon, talk, channel cross section: ratio, Particle Physics - Experiment
Abstract

Measurements are presented of the inclusive distributions of theJ/Ψ meson produced by muons of energy 200 GeV from an ammonia target. The gluon distribution of the nucleon has been derived from the data in the range 0.04

Published
1992

3. Forward produced hadrons in $\mu p$ and $\mu d$ scattering and investigation of the charge structure of the nucleon

Author

W.S.C. Williams, T. Schröder, S. Wheeler, J. Nassalski, Stephen Wimpenny, Jozsef Toth, V. Papavassiliou, J. Stock, Christopher Bee, D. Lauterjung, L. Urban, F. Lettenström, G. Coignet, B. Korzen, J.R. Holt, F. G. Oakham, Tim Jones, Klaus Hamacher, M. Whalley, V. Gibson, J. Favier, M. C. Caputo, Ricardo Piegaia, J. S. Chima, Karl Ziemons, A. Sandacz, C. Benchouk, A. Jacholkowska, G.R. Court, E. Gabathuler, H. E. Stier, R. F. Oppenheim, M. Edwards, R. Gamet, T. Ernst, B. Badelek, P.J. Hayman, J. G. Loken, V. W. Hughes, E. Rondio, B. Pietrzyt, H. Peschel, K. Schultze, J. Womersley, Joshua Thompson, D. Lanske, K. Rith, Ulrich Landgraf, M. Düren, J. Beaufays, Roland Windmolders, Uwe Pietrzyk, P. B. Renton, C. Peroni, E. M. Kabuss, Bogdan Povh, I. G. Bird, M. I. Ferrero, L. Ropelewski, G. D'Agostini, F. Combley, Amedeo Staiano, T. O. Niinikoski, N. Pavel, P. Grafström, F. Montanet, A. W. Edwards, T. Walcher, H. Wahlen, M. Matthews, J. G. Ashman, T. J. Sloan, Harry Cheung, D. Salmon, A.M. Osborne, S. Kullander, P. R. Norton, N. Dycew, W. Wallucks, J. M. Rieubland, Y. Mizuno, David Francis, J. Gillies, K. P. Schüler, Adam C. Schneider, A. Schlagböhmer, J. Drees, S.C. Brown, T. A. Shibata, Klaus Mönig, T. Lindqvist, R. W. Clifft, U. Krüner, Geoffrey Taylor, D. von Harrach, E. Nagy, Günter Baum, Jacek Ciborowski, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Quark, Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, Hadron, Multiplicity (mathematics), Deep inelastic scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Sum rule in quantum mechanics, Nuclear Experiment, 010306 general physics, Nucleon, Engineering (miscellaneous), Particle Physics - Experiment, Lepton
Abstract

Final data measured with the EMC forward spectrometer are presented on the production of forward charged hadrons in μp and μd scattering at incident beam energies between 100 and 280 GeV. The large statistic of 373 000 events allows a study of the semi-inclusive hadron production as a function ofz,pT2 and 〈pT2〉 in smallQ2,xBj andW bins. Charge multiplicity ratios and differences as a function ofz andxBj are given forp, d andn-targets. From the differences of charge multiplicities the ratio of the valence quark distributions of the protondv(x)/uv(x) is determined for the first time in charged lepton scattering. The Gronau et al. sum rule is tested, the measured sum being 0.31±0.06 stat. ±0.05 syst., compared with the theoretical expectation of 2/7≈0.286. The measured sum corresponds to an absolute value of the ratio of thed andu quark charge of 0.44±0.10 stat.±0.08 syst.

Published
1991

4. An investigation of the spin structure of the proton in deep inelastic scattering of polarised muons on polarised protons

Author

H. E. Stier, H. Peschel, C. Benchouk, T. Walcher, Stephen Wimpenny, E. M. Kabuss, L. Ropelewski, N. Dyce, Roland Windmolders, Y. Mizuno, Michael Düren, Uwe Pietrzyk, A. Sandacz, Günter Baum, Klaus Mönig, T. Lindqvist, J. G. Ashman, P. Grafström, Harry Cheung, D. Salmon, A.M. Osborne, S. Kullander, R. W. Clifft, I. G. Bird, G. Coignet, W. Wallucks, Joshua Thompson, A. W. Edwards, T. A. Shibata, R. F. Oppenheim, F. Combley, V. W. Hughes, U. Krüner, Ulrich Landgraf, J. Beaufays, C. Peroni, Bogdan Povh, E. Gabathuler, W. J. Womersley, G. D'Agostini, P. R. Norton, T. Ernst, B. Badelek, M. C. Caputo, Amedeo Staiano, T. J. Sloan, T.O. Niinikoski, E. Rondio, S.C. Brown, Jozsef Toth, Jacek Ciborowski, J. Drees, Christopher Bee, Geoffrey Taylor, Tim Jones, Ricardo Piegaia, J. G. Loken, Klaus Hamacher, J. Gillies, Karl Ziemons, K. P. Schüler, K. Schultze, R. Gamet, D. Lanske, P.J. Hayman, T. Schröder, B. Pietrzyk, J. M. Rieubland, David Francis, S. Wheeler, J. Nassalski, A. Rijllart, E. Nagy, K. Rith, P. B. Renton, B. Korzen, M. Matthews, D. A. Williams, F. Montanet, J. Stock, F. Lettenström, J.R. Holt, V. Gibson, F. G. Oakham, G.R. Court, W.S.C. Williams, D. V. Harrach, V. Papavassiliou, M. I. Ferrero, M. Edwards, J. S. Chima, N. Pavel, A. Jacholkowska, L. Urban, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Damoiseaux, Magali

Subjects
Quark, Physics, Nuclear and High Energy Physics, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Proton, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, media_common.quotation_subject, Nuclear Theory, Spin structure, Deep inelastic scattering, 01 natural sciences, Asymmetry, European Muon Collaboration, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Particle Physics - Experiment, media_common
Abstract

An investigation of the spin structure of the proton in deep inelastic scattering of polarised muons on polarised protons

Published
1989

5. Dynamic nuclear polarization of irradiated targets

Author

Y.-N. Guo, Albrecht Winnacker, K. P. Schüler, Vernon W. Hughes, S.St. Lorant, A. Amittay, K. Morimoto, Paul Souder, R. F. Oppenheim, M. L. Seely, M. R. Bergström, S. Miyashita, Kiminori Kondo, and Satish Dhawan

Subjects
Physics, Proton, Dopant, Hydrogen, Butanol, Radiochemistry, Doping, Analytical chemistry, General Engineering, chemistry.chemical_element, Polarization (waves), Photochemistry, Linear particle accelerator, chemistry.chemical_compound, Paramagnetism, Nuclear magnetic resonance, Deuterium, Beamline, chemistry, Lithium borohydride, Cathode ray, Irradiation, Radiation resistance
Abstract

We have irradiated and studied dynamic nuclear polarization in ammonia, deuterated ammonia, butanol, borane ammonia, methylamine, ethane and lithium borohydride in order to test these substances for potential use as polarized target materials. These studies were conducted using a polarized target system operating at a temperature of 1K and a magnetic field of 5T. The target system was set up in a beam line at the Stanford Linear Accelerator Center, enabling us to irradiate the targets in situ at 1K with a 6 to 20 GeV electron beam and to study their polarization properties simultaneously. Proton polarizations of ∼70% and deuteron polarizations of ∼25% were obtained in irradiated NH3 and ND3, with relatively short values of the polarizations growth time Tp. For both of these materials, the radiation resistance of the polarization was found to be approximately 30 times greater than for conventional chemically doped hydrocarbon targets. In the remaining irradiated materials tested, relatively small proton polarizations (∼30% or less) were obtained and these materials do not seem to be suitable for polarized target applications. Irradiated NH3 and ND3, however, are very promising as practical polarized target materials.

Published
1982

6. New Measurement of Deep-Inelastice−pAsymmetries

Author

S. Miyashita, Roger H. Miller, Paul Souder, M. S. Lubell, U. Moser, V. R. Harsh, I. Nakano, M. R. Bergström, Noboru Sasao, Z. L. Mao, R. F. Oppenheim, K. Morimoto, Wilhelm Raith, Günter Baum, Y.-N. Guo, J.E. Clendenin, V. W. Hughes, L. Panda, D. A. Palmer, Satish Dhawan, Kiminori Kondo, M. Werlen, S.St. Lorant, M. L. Seely, P. R. Bolton, N. R. DeBotton, K. Takikawa, and K. P. Schüler

Subjects
Physics, Quantum chromodynamics, Angular momentum, Scattering, media_common.quotation_subject, General Physics and Astronomy, Electron, Inelastic scattering, Deep inelastic scattering, Asymmetry, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Sum rule in quantum mechanics, Atomic physics, media_common
Abstract

Spin-dependent asymmetries have been measured in inclusive deep-inelastic scattering of longitudinally polarized electrons by longitudinally polarized protons. Data were obtained at a scattering angle of 10/sup 0/ and for incident energies of 16.2 and 22.7 GeV, which cover the kinematic range 0.18

Published
1983

7. A measurement of the spin asymmetry and determination of the structure function g1 in deep inelastic muon-proton scattering

Author

B. Korzen, K. Schultze, R. F. Oppenheim, D. Lanske, F. Combley, P. Hayman, M. Matthews, J. Beaufays, L. Ropelewski, N. Dyce, F. Montanet, K. P. Schüler, T. Schröder, T. A. Shibata, M. C. Caputo, G. Oakham, Klaus Mönig, Günter Baum, A. Rijllart, G. Coignet, U. Krüner, R. W. Clifft, Stephen Wimpenny, T. Walcher, E. M. Kabuss, Amedeo Staiano, T. Ernst, J. Drees, B. Badelek, W. J. Womersley, A. M. Osborne, S. Wheeler, J. G. Ashman, M. I. Ferrero, Geoffrey Taylor, T. Lindqvist, Harry Cheung, D. Salmon, A. Sandacz, J. Nassalski, S. C. Brown, J. Gillies, G. Court, T. J. Sloan, F. Lettenström, C. Benchouk, M. Edwards, Roland Windmolders, David Francis, J. Stock, Michael Düren, V. W. Hughes, J. M. Rieubland, P. R. Norton, Klaus Rith, P. Renton, J. Gajewski, Ulrich Landgraf, Bogdan Povh, W. S. C. Williams, Christopher Bee, R. Gamet, J. S. Chima, J. R. Holt, E. Gabathuler, Jacek Ciborowski, Klaus Hamacher, S. Kullander, Karl Ziemons, V. Papavassiliou, J. C. Thompson, D. von Harrach, N. Pavel, H. E. Stier, H. Peschel, J. Loken, E. Rondio, B. Pietrzyk, T. Niinikoski, Y. Mizuno, G. D'Agostini, V. Gibson, Tim Jones, Ricardo Piegaia, C. Peroni, P. Graftström, A. Jacholkowska, Uwe Pietrzyk, I. G. Bird, A. W. Edwards, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Physics, Quark, Nuclear and High Energy Physics, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, Nucleon spin structure, 01 natural sciences, Asymmetry, European Muon Collaboration, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, High Energy Physics::Experiment, Sum rule in quantum mechanics, 010306 general physics, Particle Physics - Experiment, media_common, Spin-½
Abstract

A measurement of the spin asymmetry and determination of the structure function g1 in deep inelastic muon-proton scattering

Published
1988

9. Internal Spin Structure of the Proton from High Energy Polarized e-p Scattering

Author

M. L. Seely, P. R. Bolton, K. Takikawa, Y.-N. Guo, C.-L. Mao, M. S. Lubell, W. Raith, S. Miyashita, Vernon W. Hughes, N. R. DeBotton, K. Kondo, I. Nakano, L. Panda, S. K. Dhawan, R. F. Oppenheim, U. Moser, K. Morimoto, J. Sodja, M. Werlen, V. R. Harsh, N. Sasao, P. A. Souder, K. P. Schüler, S.St. Lorant, R. A. Fong-Tom, R. H. Miller, Günter Baum, M. R. Bergström, D. A. Palmer, and J. E. Clendenin

Subjects
Physics, Nuclear physics, Proton, Scattering, Physics::Accelerator Physics, Atomic physics, Inelastic scattering, Nucleon, Deep inelastic scattering, Hyperfine structure, Resonance (particle physics), Spin-½
Abstract

A review is given of our experimental knowledge of the spin dependent structure functions of the proton, which is based on inclusive high energy scattering of longitudinally polarized electrons by longitudinally polarized protons in both the deep inelastic and resonance regions, and includes preliminary results from our most recent SLAC experiment. Implications for scaling, sum rules, models of proton structure, and the hyperfine structure interval in hydrogen are given. Possible future directions of research are indicated.

Published
1981

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